document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=728909>Question 728909</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an unbiased coin is tossed three times in succession . what is the probability of obtaining 'tail' at least once </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #445703 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=445703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> P(3 heads) = (1/2)^3 = 1/8\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "P(At least one tail) = 1 - P(3 heads)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "P(At least one tail) = 1 - 1/8\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "P(At least one tail) = <font color=\"red\">7/8</font> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );